<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/2.1.3/jquery.js"></script>
</head>
<body>
    <h1>jQuery-ajax</h1>
    <button id="btn">不要点我</button>

    <script>
        $('#btn').click(function(){
            $.ajax({
                type : 'GET',
                url : '/donT',
                cache : false,
                data : {
                    userId : '001'
                },
                dataType : 'json',
                timeout : 20000,
                success(data){
                    console.log(data);
                }
            })
        })
    </script>
</body>
</html>